try { // code to read file here } catch (FileNotFoundException e) { Console.WriteLine("File not found: " + e.Message); return ErrorCode.FileNotFound; }
public int CalculateSum(int a, int b) { if (a < 0 || b < 0) { return ErrorCode.InvalidParameter; } return a + b; }Package Library: The ErrorCode class is part of the System namespace in the .NET framework, which is included in the standard C# libraries. No additional package or library is required to use it.